Set a signature for outgoing email in Outlook 365!: Open File ❯ Options ❯ Mail ❯ scroll down to ‘Compose messages’ and click on the ‘Signatures’ button to open the Signatures and Stationery box. Click ‘New’ and give the signature a name. Click on the name in the ‘Select signature to edit’ box, then add text and formatting and click Save. In ‘Choose default signature’ make sure to have the signature name in New messages and Replies/forwards and click ‘OK’
